### About Me

I am currently a postdoctoral research at IBM T.J. Watson in Yorktown Heights, NY. See my IBM profile. I received my Ph.D. in mathematics from the University of California at Davis in 2009 where my Ph.D. advisor was Jesus De Loera. I was a postdoc at the University of Kentucky from 2009 to 2012 where my advisor was Ruriko Yoshida. My research interests include machine learning, topological data analysis, graphical models, statistical processes, computational genomics, computational biology, phylogenetics, matroids, algebraic statistics, and algorithms. Please see my IBM profile http://researcher.ibm.com/person/us-dhaws.

### Publications

"*QuickLexSort: An efficient algorithm for lexicographically sorting nested restrictions of a database*", D. Haws, Submitted to Algorithmica & http://arxiv.org/abs/1310.1649, 2013.

"*Variable-selection emerges on top in a survey of whole genome complex trait prediction methods on empirical data sets*", David C. Haws, Irina Rish, Simon Teyssedre, Dan He, Aurelie C Lozano, Prabhanjan Kam- badur, Zivan Karaman, and Laxmi Parida, Submitted to Nature Biotechnology, 2013.

"*Mint: Mutual information based transduc- tive feature selection for genetic trait prediction*", Dan He, David Haws, Irina Rish, and Laxmi Parida, Submitted Bioinformatics, 2013.

"*Learning Bayesian Network Structure: Towards the Essential Graph by Integer Linear Programming Tools*", M. Studeny and D. Haws, ournal of Approximate Reasoning, 2013.

"*On polyhedral approximations of polytopes for learning bayes nets*", M. Studeny and D. Haws, Journal of Algebraic Statistics, 2012.

"*Estimating the number of zero-one multi-way tables via sequential importance sampling*", Annals of the Institute of Statistical Mathematics, 2011.

"*Chemical engineering by plant symbionts to enhance niche adaptation: A 12- genome comparison reveals dynamic alkaloid loci*", Christopher L. Schardl, Stefan G. Amyotte, Zhiqiang An, Kalina Andreeva, Elissaveta G. Ar- naoudova, Charles T. Bullock, Patrick Calie, Nikki Charlton, Murray Cox, Randy D. Dinkins, Mark L. Farman, Damien J. Fleetwood, Simona Florea, Anthony E. Glenn, Ulrich Güldener, Daniel R. Harris, David C. Haws, Uljana Hesse, Walter Hollin, Jerzy W. Jaromczyk, Jolanta Jaromczyk, Richard D. Johnson, Anar K. Khan, Eckhard Leistner, Adrian Leuchtmann, Chun- jie Li, JinGe Liu, Jinze Liu, Miao Liu, Wade Mace, Neil Moore, Padmaja Nagabhyru, Donal O’Sullivan, Birgitt Oeser, Juan Pan, Daniel G. Panaccione, Jan Schmid, Kathryn K. Schweri, Barry Scott, Ulrike Steiner, Koya Sugawara, Johanna Takach, Eiji Tanaka, Paul Tudzynski, Christine R. Voisey, Jennifer S. Webb, Ella V. Wilson, Ruriko Yoshida, Carolyn A. Young, and Zheng Zeng. Submitted to Science, 2011.

"*Polyhedral approach to statistical learning graphical models*", M. Studeny, D. Haws, R. Hemmecke, and S. Lindner. To appear in the Proceedings of the Second CREST–SBM International Conference, “Harmony of Grobner Bases and the Modern Industrial Society”, 2011.

"*Semigroups and sequential importance sampling for multiway tables and beyond*", Jing Xi, Shaoceng Wei, Feng Zhou, Ruriko Yoshida, David Haws. Available at http://arxiv.org/abs/1108.2311. Submitted to J. of Multivariate Analysis, 2011.

"*On polyhedral approximations of polytopes for learning Bayes nets*", M. Studeny, D. Haws, http://arXiv.org/abs/1107.4708 and Research Report Academy of Sciences of the Czech Republic, Institute of Information Theory and Automation, No 2303, 2011.

"*Degree bounds for a minimal Markov basis for the three-state toric homogeneous Markov chain model*", David Haws, Abraham Martin Del Campo, Ruriko Yoshida. To appear in the Proceedings of the Second CREST–SBM International Conference “Harmony of Grobner Bases and the Modern Industrial Society.” Available at http://arxiv.org/abs/1108.0481 , 2011.

"*A Support Vector Machine Based Test for Incongruence Between Sets of Trees in Tree Space*", D. Haws, P. Huggins, E. O’Neill, D. Weisrock and R. Yoshida,submitted to Systematic Biology, 2011.

"*Approximation Techniques in Solving Optimal Camera Placement Problems*", S. Cheung, D. Haws, R. Yoshida, J. Zhao, submitted to ICCV, 2011.

"*Optimality of the Neighbor Joining Algorithm and Faces of the Balanced Minimum Evolution Polytope*", D. Haws, T. Hodge, R. Yoshida, Bulletin of Mathematical Biology. Published on-line DOI: 10.1007/s11538-011-9640-x Available at http://arxiv.org/abs/1004.2073, 2011.

"*Bayes Estimators for Phylogentic Reconstruction*", P.M. Huggins, W. Li, D. Haws, T. Friedrich, J. Liu, and R. Yoshida, Volume 60, Issue 4, Systematic Biology. page 528–540. Available at http://arxiv.org/abs/0911.0645, 2011.

"*Statistical Phylogenetic Tree Analysis Using Differences of Means*", E. Arnaoudova, D. Haws, P. Huggins, J. Jaromczyk, N. Moore, C. Schardl, R. Yoshida, Front. Psychiatry volume 1 number 47. doi:10.3389/fnins.2010.00047 Available at http://arxiv.org/abs/1004.2101, 2010

"*Computation in Multicriteria Matroid Optimization*", J. De Loera, D. Haws, J. Lee, and A. O'Hair, Journal of Experimental Algorithmics, 2009.

"*Ehrhart Polynomials of Matroid Polytopes and Polymatroids*", J. De Loera, D. Haws, and M. Koppe, Journal of Discrete and Computational Geometry, (May 9, 2008), eprint arXiv:0710.4346.

"*A Computational Study of Integer Programming Algorithms Based on Barvinok's Rational Functions*", J. De Loera, D. Haws, R. Hemmecke, P. Huggins, and R. Yoshida, The Journal of Discrete Optimization, vol. 2 (June 30, 2005), pp. 135-144.

"*Short Rational Functions for Toric Algebra and Applications*", J. De Loera, D. Haws, R. Hemmecke, P. Huggins, B. Sturmfels, and R. Yoshida,The Journal of Symbolic Computation, vol. 38 no. 2

(2004), pp. 959--973.

"*Three Kinds of Integer Programming Algorithms based on Barvinok's Rational Functions*", J. De Loera, D. Haws, R. Hemmecke, P. Huggins, and R. Yoshida, in Integer Programming and Combinatorial Optimization: 10th International IPCO Conference, edited by D. Bienstock and G. Nemhauser (2004), pp. 244 -- 255, Springer.